From: khizmax <khizmax@gmail.com>
Date: Thu, 1 Dec 2016 08:39:07 +0000 (+0300)
Subject: Fixed update desc sequencer
X-Git-Tag: v2.2.0~26
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=83d6eb062ea658d36e1abc3f340a1ecc5fbf4958;p=libcds.git

Fixed update desc sequencer
---

diff --git a/cds/intrusive/details/ellen_bintree_base.h b/cds/intrusive/details/ellen_bintree_base.h
index efef4eec..41cb8b18 100644
--- a/cds/intrusive/details/ellen_bintree_base.h
+++ b/cds/intrusive/details/ellen_bintree_base.h
@@ -247,7 +247,7 @@ namespace cds { namespace intrusive {
             //@cond
             update_ptr null_update_desc()
             {
-                return update_ptr( reinterpret_cast<update_desc_type *>( (m_nEmptyUpdate.fetch_add(1, atomics::memory_order_relaxed) << 2) & 0xFFFF ));
+                return update_ptr( reinterpret_cast<update_desc_type *>( ((m_nEmptyUpdate.fetch_add(1, atomics::memory_order_relaxed) + 1 ) << 2) & 0xFFFF ));
             }
 
             base_class * get_child( bool bRight, atomics::memory_order mo ) const